It begins in Saskatchewan in the Pasquia Hills and traverses boreal forests and muskeg in the Boreal Plains Ecozone, moving from the Mid-Boreal Upland of the Pasquia Hills east to the Mid-Boreal Lowland.

[3][4] Pasquia River begins at a small lake in the Rural Municipality of Hudson Bay No.

Coming out of the hills, it crosses Highway 9 and flows in an easterly direction towards the Manitoba border.

Big Lake (which naturally drains into the Carrot River) was developed to store water during spring runoff.

[11] Fish commonly found in Pasquia River include walleye, burbot, lake sturgeon, and northern pike.